Optimize list of builds for Windows platform. Leave only builds we really use.

appveyor.yml

@@ -69,104 +69,6 @@ environment:
     VSVER: 16
     PLATFORM: x64
     DEPLOY: false 
-  - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2019
-    QT5: Qt\5.14\mingw73_32
-    QT_VERSION: Qt5_14
-    QMAKE_GENERATOR: "MinGW Makefiles"
-    MINGW_PATH: C:\Qt\Tools\mingw730_32\bin
-    PLATFORM: x86
-    DEPLOY: false
-  - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2019
-    QT5: Qt\5.14\mingw73_64
-    QT_VERSION: Qt5_14
-    QMAKE_GENERATOR: "MinGW Makefiles"
-    MINGW_PATH: C:\Qt\Tools\mingw730_64\bin
-    PLATFORM: x64
-    DEPLOY: false
-  - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2019
-    QT5: Qt\5.14\msvc2017_64
-    QMAKE_GENERATOR: "NMake Makefiles JOM"
-    VSVER: 15
-    PLATFORM: x64
-    DEPLOY: false
-  - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2019
-    QT5: Qt\5.13\mingw73_64
-    QT_VERSION: Qt5_13
-    QMAKE_GENERATOR: "MinGW Makefiles"
-    MINGW_PATH: C:\Qt\Tools\mingw730_64\bin
-    PLATFORM: x64
-    DEPLOY: false
-  - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2019
-    QT5: Qt\5.13\msvc2017_64
-    QMAKE_GENERATOR: "NMake Makefiles JOM"
-    VSVER: 15
-    PLATFORM: x64
-    DEPLOY: false
-  - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2019
-    QT5: Qt\5.12\mingw73_64
-    QT_VERSION: Qt5_12
-    QMAKE_GENERATOR: "MinGW Makefiles"
-    MINGW_PATH: C:\Qt\Tools\mingw730_64\bin
-    PLATFORM: x64
-    DEPLOY: false
-  - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2019
-    QT5: Qt\5.12\msvc2017_64
-    QMAKE_GENERATOR: "NMake Makefiles JOM"
-    VSVER: 15
-    PLATFORM: x64
-    DEPLOY: false  
-  - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2017
-    QT5: Qt\5.11\mingw53_32
-    QT_VERSION: Qt5_11
-    QMAKE_GENERATOR: "MinGW Makefiles"
-    MINGW_PATH: C:\Qt\Tools\mingw530_32\bin
-    PLATFORM: x86
-    DEPLOY: false 
-  - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2015
-    QT5: Qt\5.11\msvc2015_64
-    QMAKE_GENERATOR: "NMake Makefiles JOM"
-    VSVER: 14
-    PLATFORM: x64
-    DEPLOY: false
-  - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2017
-    QT5: Qt\5.10\mingw53_32
-    QT_VERSION: Qt5_10
-    QMAKE_GENERATOR: "MinGW Makefiles"
-    MINGW_PATH: C:\Qt\Tools\mingw530_32\bin
-    PLATFORM: x86
-    DEPLOY: false
-  - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2017
-    QT5: Qt\5.10\msvc2017_64
-    QMAKE_GENERATOR: "NMake Makefiles JOM"
-    VSVER: 15
-    PLATFORM: x64
-    DEPLOY: false
-  - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2017
-    QT5: Qt\5.9\mingw53_32
-    QT_VERSION: Qt5_9
-    QMAKE_GENERATOR: "MinGW Makefiles"
-    MINGW_PATH: C:\Qt\Tools\mingw530_32\bin
-    PLATFORM: x86
-    DEPLOY: false
-  - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2017
-    QT5: Qt\5.9\msvc2017_64
-    QMAKE_GENERATOR: "NMake Makefiles JOM"
-    VSVER: 15
-    PLATFORM: x64
-    DEPLOY: false
-  - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2015
-    QT5: Qt\5.7\mingw53_32
-    QT_VERSION: Qt5_7
-    QMAKE_GENERATOR: "MinGW Makefiles"
-    MINGW_PATH: C:\Qt\Tools\mingw530_32\bin
-    PLATFORM: x86
-    DEPLOY: false
-  - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2015
-    QT5: Qt\5.7\msvc2015
-    QMAKE_GENERATOR: "NMake Makefiles JOM"
-    VSVER: 14
-    PLATFORM: x86
-    DEPLOY: false
   - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2015
     QT5: Qt\5.6\msvc2015_64
     QT_VERSION: Qt5_6